Chemical Composition and Surface Roughness of AlOx-Controlled Activity of Pt/AlOx Thin Film Catalysts for Methanol Oxidation Reaction

被引：2
|
作者：
Chen, Ying [1 ,2 ]
Liu, Jun [1 ,3 ]
Wang, Xiaohong [1 ,4 ]
Wang, Wei [1 ,4 ]
Zeng, Zhigang [1 ,2 ]
Hu, Zhiyu [1 ,2 ,5 ]
机构：
[1] Shanghai Univ, Inst NanoMicroEnergy, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Coll Sci, Dept Phys, Shanghai 200444, Peoples R China
[3] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[4] Shanghai Univ, Coll Sci, Dept Chem, Shanghai 200444, Peoples R China
[5] Shanghai Jiao Tong Univ, Dept Micro Nano Elect, Natl Key Lab Sci & Technol Micro Nano Fabricat, Shanghai 200240, Peoples R China
来源：
CATALYSIS LETTERS | 2014年 / 144卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Magnetron sputtering; Pt/AlOx thin film catalyst; O-2/Ar ratio; Surface roughness; Chemisorbed Oxygen; VANADIA CATALYSTS; SPECTROSCOPY; AL2O3;
D O I：
10.1007/s10562-014-1331-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Chemical composition and surface roughness of AlOx films were facilely controlled by manipulating O-2/Ar ratio during aluminum oxide sputter-deposition process. Pt/AlOx catalyst synthesized with O-2/Ar ratio of 2 % exhibits the highest roughness (8.55 nm) and lowest O/Al ratio (0.11), which showed the best catalytic activity with a methanol conversion rate of 92.5 % and a remarkable temperature rise of 12 A degrees C induced by exothermic reaction at 100 A degrees C. It was demonstrated that Pt/AlOx catalysts had significant higher activity for methanol oxidation when the AlOx was nonstoichiometric compared with its stoichiometric counterpart (Al2O3). The outstanding catalytic performance and novel nanostructure of the deposited Pt/AlOx thin film catalyst endow it with great potential for developing next-generation energy conversion devices and combustible gas sensors.
引用
收藏
页码：1696 / 1703
页数：8
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